Carrier for gluing-clamps.



PATBNTED SEPT. 29, 1903.

N. J. BILLSTRDM. CARRIER FOR GLUING GLAMPS.

APPLICATION FILED MAE. 27, 1908.

No Mo'nm..

2 SHEETS-SHEET l.

Q m ONO w .mw El No. 740,219. PATENTBD SEPT. 29, 1993.

` N. J. BILLSTROM. y

f CARRIER POR GLUING GLAMPS.l

APPLIGMJION FILED ma. 27. 1999. No nonni.. 9 SHEETS-SHEET a.

UNITED STATES Patented September 29, 1.903.

NELS J. BILLSTROM, OF ROOKFORD, ILLINOIS.

CARRIER FOR GLUiNG-CLAMPS.

SPECIFICATION forming part of Letters Patent No. 740,219, datedSeptember 29, 1903. Application filed March 27, 1903. Serial No.149,855. (No model.)

.To MZ whom it may concern: Y

Be it known that I, Nuns J. BILLsTRoM, a

citizen ofthe United States, residing at Rockford, in the county ofWinnebago and State of Illinois, have invented certain new and usefulImprovements in Carriers for gluing- Clamps, of which the following is aspecification.

The object of this invention is toconstruct a machine su pporting aseries of screw-clamps carried by an endless carrier, means for movingthe carrier and automatically stopping the carrier, and in the detailsof construction hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a side elevation. Fig. 2 is aplan View. Fig. 3 is an end elevation. Fig. 4 is an isometricalrepresentation of one of the clamps detached from the machine. Fig. 5 isa vertical sec` tion of the automatic stopping device. Fig. 6 is atransverse section on dotted line o., Fig. 5. Fig. 7 is an isometricalrepresentation of the trip-lever for stopping the machine. Y

In gluing boards employed in the make-up of articles of furniture it hasbeen customary to place a series of clamps on benches, placeI thematerial to be glued in the clamps and tighten them up', and then carrythe clamps and material some distance from the benches and allowing theglue to set, after which the clamps and material are returned to thebenches and the material taken from the clamps. The operation consumedmore time in carrying the clamps and material from and to the benchesthan was consumed in placing the material in and taking it out of theclamps. By my improvements I propose to employ mechanical devices forcarrying the clamps and material away from the place Where the gluing islcarried on and returning them When the glue is set. I accomplish thisby the employment of an endless carrier, which is moved slow enough thatwhen a complete trip is made the glue has had time to set. The mainframe in this instance comprises the horizontal upper bars 1 and legs2secured to the base 3. Boxes 4 are secured to the upper face of thehorizontal portions of the main frame. Twoshafts 5 and 6 are supportedby the boxes. The shaft supports two heads 7, each in this instancebeing four- 'porting a dog 28.

sided. The shaft 6 supports two heads 8,

each in this instance being four-sided. Two endless chains 9 and 10 forma connection between the four heads, and the links are ofthe same lengthas the sides of the heads. At the point of connection between the linksof the chains is located a roller 11, which rests upon the support 12,secured to the main frame, and asupportl, connected to the main frame,receives the rollers and holds the chains e1e vated in their returnmovement. Each pair of links of 'the chains is connected by rods 14 and15' and located near the pivotal connection between the-links.

At Fig. 4 is shown one of the clamps in con nection with the rods 14 andvl5. Abracket 16 has its lower end provided with a semicircular recess17 ,of a size to receive the rod 15, and the upper end has a recess 18.To the upper end of the bracket is secured a clamping-plate 19 by athumb-screw 20. A bar 21 has a connection with the bracket 16 and eX-tends at substantially right" angles thereto. This bar supports anabutment 22 near its inner end and a screw 23 near its outer end. Theseclamps are connected to the rods 14 and 15 and held in place thereon bythe plate 19 and thumb-screw 2O and can be adjusted in the lengthwisedirection of the rods, and a series of these clamps can be supported bya pair of the rods. To one end of the shaft 6 is secured a ratchet-Wheel24, having four teeth. 1A counter-shaft 25 is supported by the mainframe and has a crank-head2@ secured to one end. An arm 27 has a pivotalconnectionl on the shaft G, its upper end sup- A link 29 has one endconnested to the upper end of the arm 27 and its other end to thecrank-head. A cam 30 is secured to the shaft 25. To the base of themachine are secured two brackets 31, towhich are pivoted the uprights32, connected by a cross-bar 33. VA link 34 has one end pivot-allylconnected to the base of the machine and its fr ee end pivotallyconnected to an arm 35 intermediate its ends, one end of this armhavin'g a pivotal connection With one of the uprights 32, and its otherend supports a roller 36,against which the cam 30 moves. A spring 37 hasone end connected to the main frame and its other end to one 'of theuprights 32.

That portion of the shaft extending beyond its support has a keyway 3Sformed therein. A key 39 is located in the keyway and has a pivotalconnection with the shaft. A spring is located behind the key. Thedrivingpulley 4l is located on the shaft 25 and has a keyway 42 formedin its hub portion. When the keyway of the driving-pulley coincides withthe key 39, lthe key will be forced into the keyway, thereby forming aconnection between the driving-pulleyand shaft 25,which will rotate theshaft in the direction indicated by the arrow. The rotation of the shaftwill rotate the crank-head 26 and cam 30, which will carry the link 29and dog 28 downward, and as the dog engages one of the teeth of theratchet-wheels 24 the ratchet-wheel will be rotated a qu arter ofarevolution during the rst half-revolution ofthe crank-head, and the dogwill be returned to its starting position during the remaininghalf-revolution of the cranky head,which will move the clamps at thefront end of the machine-from a horizontal position to a verticalposition. The first half of a revolution of the cam 30 will force theframe composed of the uprights 32 and bar 33 into the position shownindotted lines, which will allow the clamps to pass the bar 33, and afterthe advancing clamp has attained its horizontal position the remaininghalf-revolution of the cam will allow the spring to return the bar33under the clamps and support them.

It is necessary that the movements of the chains be automaticallystopped after the advancing clamp has assumed its horizontal position,and for accomplishing this purpose I have located a cam composed of thetwo surfaces 43 and 44, having a pivotal connection with a suitablesupport, and a rod 45, extending within reach of the operator, serves toturn the cam. The cam-surface 43 is located within the path of theprojecting end of the key, and as the key revolves it will move up thissurface until it is free of the keyway in the hub of the driving-pulley,which will break the connection between the shaft 25 and driving-pulley41, thereby allowing the pulley to constantly `rotate and the shaft toremain at rest. By moving the cam into the position shown in dottedlines, Fig. 5, the spring 40 will force the key out into the keyway ofthe driving-pulley, thereby forming the connection between thedriving-pulley and shaft 25. As the driving-pulley revolves it carries aprojection 46, which will move in contact with the cam-surface 44 whenthe cam-surface is in the position shown in dotted lines, Fig. 5, andwill move the cam.into the position shown in solid lines in order thatthe camsurface 43 may be in position to receive the `projecting end ofthe key.

In starting the machine the operator simply turns the cam 43 from theposition shown in solid lines, Fig. into the position shown in dottedlines, and after a revolution of the shaft 25 has been completed it willbe automatically stopped. The boards after being glued are placed on theclamps atthe frontend of the machine and securely held together by thescrews of the clamps. The machine is then started, which will bring anew set of clamps into position to receive boards, and the operation isrepeated until all the clamps 'have been filled with boards, and bythetime the clamps first lled with boards reach the operator the glue willbe set, and the boards can be removed and others substituted.

The clamps can be adjusted in the lengthwise direction of the rods 14and l5 to receive boards ofdiiferent lengths, and more than two clampscan be employed for each pair ofrods, as the lengths of the boards mayrequire.

I claim as my inventionl. The combination of a main frame, two shafts,an endless carrier supported by the shafts, clamps supportedv by. thecarrier, means for moving the carrier, and means for automaticallystopping the'carrier when each set of clamps completes a revolution.

2. The combination of a main frame, two shafts, an endless carrier,clamps supported by the carrier, means for moving the carrier and asupport for one set of clamps when the carriers are at rest.

3. The combination of a main frame, two

shafts, an endless carrier, clamps supported l by the carrier, means formoving the carrier, a support for one set of clamps when the carrier isat rest, and means for moving thesupport from under the clamps.

4. The combination of a main frame, two shafts, an endless carrier,clamps supported by the carrier, means for moving the carrier,

,a support for one set of clamps when the carrier is at rest, and meansfor moving the sup-v IOO IIO

